The episode title was "Trompe L'oiel" — a term used to describe a visual illusion of depth in art.

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Dolores used charcoal to paint on a canvas cloth when her and William were in the train car. She drew a landscape where the cliffs met the sea using the trompe l'oiel technique, forcing the perspective to appear three dimensional.

But the painting reference was made in more than just Dolores' literal drawing.

The double meaning of the "Trompe L'oeil" episode titles comes from Bernard's big reveal as a host.

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Ford used the backstory of Bernard's wife and son to give his programmed personality more depth. Every coded action of Bernard's was like a miniature display of trompe l'oeil — an illusion meant to give his humanness a sense of depth and three-dimensionality.

In a sense, every host is like a physical example of trompe l'oiel, with hardwired personalities and backstories designed to make them appear more realistic.

Dolores' painting of the sea also recalled a conversation she had with Teddy in episode three.

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In the third episode, Dolores and Teddy had a conversation about leaving Sweetwater together one day. "You've traveled all over these parts — isn't there anywhere we could go?" Dolores asked Teddy.

"There is a place I heard about down south, where the mountains meet the sea," Teddy told her. "They say the water's so pure there it'll wash the past clean off ya, and you can start again."

Now, four episodes later, we see Dolores drawing a scene similar to what Teddy described. And when William asked her about it, she said she didn't know what it was. "I imagined something beautiful," Dolores told William. "A place where the mountains meet the sea."

Theresa went into a non-defensive posture before Ford had her killed — a pose that Bernard taught her back in the fourth episode.

While they were talking in the basement, you could see the moment when Theresa put her hands on her hips and stood up a little taller. This was a subconscious recollection of what Bernard taught her to not appear defensive in episode four.

Back when Theresa was talking with Bernard about visiting Ford, he gave her a body language tip.

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"Some advice?" Bernard told her. "Best to not show him you're nervous or defensive."

"I have nothing to be defensive about," Theresa replied.

"Then don't cross your arms," he said. "It's an ancient instinct — the belly is the most vulnerable part of every animal."

When she placed her hands on her hips, Bernard said: "There — that’s the posture you're looking for."

It was heartbreaking to watch Theresa use Bernard's advice in episode seven, only to be brutally killed by him minutes later on Ford's orders.

In the basement work area where Theresa was killed, there was a host being created.

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We can assume that Ford has been using this miniature manufacturing station to make hosts throughout the years — including Bernard and probably others. We know the host being made in episode seven is new, because we saw this tank in episode six and it was empty.

Here's what the tank looked like in the previous episode, when Ford was talking with the younger host version of himself.

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You can see that the tank of milky liquid is empty. So when did he begin making a new host? Was it as soon as he realized Theresa needed to be "handled"? Is the host being made in the tank actually a replacement version of Theresa?

That's a sinister thought, but at this point we wouldn't put anything past Ford. He'll need to explain her death or disappearance somehow, after all.

Ford's repetition of the "blood sacrifice" line was what really drove home how powerful he is.

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Before he has Theresa murdered by Bernard, Ford reminds her that a "blood sacrifice" is needed. That is exactly what Charlotte Hale — the executive director of Delos' board — told Theresa was necessary. But Hale was talking about a host, not Theresa or another human.

Hale told Theresa about the blood sacrifice in the context of their plan to stage a host malfunctioning.

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Hale and Theresa faked a scenario in which Clementine (the host prostitute who was friends with Maeve) became violent. Clementine was effectively lobotomized as a result.

But Ford used Hale's words against Theresa, revealing just how closely he monitors everyone in their office and in the park. This time he used a host to spy.

Entertainment Weekly's James Hibberd asked Lisa Joy — one of the showrunners — how or why Ford knew what Hale had told Theresa during their private chat.

"What you might be missing is there was a host on the bed behind them when she said that — Hector," Joy told EW. "Ford has access to that kind of stuff."